my A8-4.2-Bj.97 loses water from a blind plug.Must refill 1 liter after 200 km.Repair should cost about 900 Euro at Audi, because you have to remove the left cylinder head.
The blind plug is on the back of the engine, which doesn't even fit a hand.
Who had the same problem? And how did you fix it? Is it possible that you can also use special coolant?
I'm grateful for every hint.


